Re: auto-filling a field on insert

semi-ambivalent wrote:
> On Oct 21, 8:54 pm, da...@fetter.org (David Fetter) wrote:
>> On Wed, Oct 21, 2009 at 07:17:44PM -0700, semi-ambivalent wrote:
>>> If I have a table with fields A, B, C and D how could I do something
>>> such that if I insert values in fields A, B and C field D would be
>>> auto-filled with the value A||B||C? Just a pointer of where to begin
>>> looking is fine. Triggers? Copy ... From? Table or field
>>> definitions?
>> Instead of populating your table with this extra information, create a
>> VIEW with what you want in it.
>>
>> Cheers,
>> David.
>> --
>> David Fetter <da...@fetter.org>http://fetter.org/
>> Phone: +1 415 235 3778  AIM: dfetter666  Yahoo!: dfetter
>> Skype: davidfetter      XMPP: david.fet...@gmail.com
>>
>> Remember to vote!
>> Consider donating to Postgres:http://www.postgresql.org/about/donate
>>
>> --
>> Sent via pgsql-general mailing list (pgsql-gene...@postgresql.org)
>> To make changes to your subscription:http://www.postgresql.org/mailpref/pgsql-general
>
> At first blush that looks good but I need an index on that concatted
> value and I don't seem to be able to index a field in a view. I'll
> check the docs on views to see if I'm missing something.

How about an index on the three "fields"?

http://www.postgresql.org/docs/8.4/static/sql-createindex.html


\\||/
Rod
--